Question

Why is the wave energy lower when it reaches the receiver? (Hint: think about what you know about visible light.)

Answer 1

Answer:

The visible light spectrum is the segment of the electromagnetic spectrum that the human eye can view.

More simply, this range of wavelengths is called visible light. Typically, the human eye can detect wavelengths from 380 to 700 nanometers.

Explanation

WAVELENGTHS OF VISIBLE LIGHT

All electromagnetic radiation is light, but we can only see a small portion of this radiation—the portion we call visible light. Cone-shaped cells in our eyes act as receivers tuned to the wavelengths in this narrow band of the spectrum. Other portions of the spectrum have wavelengths too large or too small and energetic for the biological limitations of our perception.

As the full spectrum of visible light travels through a prism, the wavelengths separate into the colors of the rainbow because each color is a different wavelength. Violet has the shortest wavelength, at around 380 nanometers, and red has the longest wavelength, at around 700 nanometers.

Answer 2

Answer:

There are two reasons. First, the wave spreads out as it moves away from the transmitter, which reduces its energy over a given area. Second, some energy is absorbed by the air.

Explanation: